The Vatican announced Saturday that Pope Francis remains in critical condition at Rome’s Gemelli Hospital following a respiratory crisis that required blood transfusions.

As Pope Francis continued his treatment at Rome’s Gemelli hospital Sunday, he expressed gratitude to medical staff while marking the approaching third anniversary of Russia’s invasion of Ukraine in a prepared Angelus message.

After experiencing a major downturn in his condition Saturday that required high oxygen treatment and blood transfusions, Pope Francis is resting as faithful and Church leaders in Rome and across the world rally in prayer.